Question

A dealer buys two old scooters at a total cost of 18000. By selling one
at a gain of 20% and other at a loss of 15%. He gains 100 on the whole
transaction. Calculate the cost price of each scooter.​

Answer 1

I think you have told to find SP of each Scooter

So, let's find out

TWO SCOOTER AT 18000 SO ONE AT 9000

P=P%/100*CP

Profit of first Scooter  

20/100*9000

1800

SP= CP+Profit

SP=9000+1800

SP=10800

Second Scooter

L%=L/100*9000

SO, 15/100*9000

L=1350

So, Second Scooter SP

=9000-1350=7640

HOPE it  Helped you

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